Improvement in planes for making



K. HALL.

PLANE S FOR MAKING EXCELSIOR. N.o-.I"174,Z34.

Patented Feb. 2.9}1876.

WITNESSES mounts.

N-PE'FERS. PHOTO-LITHDGRAPHER. WASHINGTON. D (Iv UNITED STATES ALBION K.HALL, or JACKSON, M-IoHIeAN.

IMPROVEMENT INPLANES FoR MAKING EXCELSIOR.

Specification forming part of Letters Patent No. 174,234., datedFebruary 29, 1876; application filed December 18, 1875.

To all whom it may concern Be it known that I, ALBION K. HALL, ofJackson, Jackson county, Michigan, have invented a new and ImprovedPlaning-Bit for Making Excelsior, of which the following is aspecification:

Figure 1 represents a sectional side elevalion, and Fig. 2a verticaltransverse section on the line 0 c, Fig. 1, of my improved plane and bitfor making excelsior.

Similar letters of reference indicate corresponding parts.

I bit for planing oft excelsior, that is used as a filling inupholstery. The bit is provided at the upperside with parallelrectangular grooves, a, at equal distance from each other, by whichtheir form of the cuttingedge, when sharpened at the proper angle,

is maintained throughout the bit. The hit produces a twofold cutting ofthe shavings, one set at the outer edges of the raised ribs and theother at the bottom of the grooves, so that two distinct and separateshavings are formed for each groove of the plane. The bit is mounted ina stock,-B, that is grooved at the lower surface to correspond with thegrooves of the bit, which causes the stock to act as a guide to keep theplane in proper direction.

I The manufacture of excelsioris by this bit greatly accelerated andfacilitated, and a uniform quality of shavings furnished thereby.

Having thus. described my invention, I claim as new and desire to secureby Letters Patent- The combination of a plane-bit, having rectangulartongues and grooves, With the stock B, provided with similar orcorresponding ones on its under side, as shown and described.

- ALBION K. HALL. Witnesses:

M. BUTCHER, THOMAS ETCHES.

PATENT Demon;

